Socket-cap.



W. MGE., BLACK.

SOCKET GAP. APPLIGATIGN FILED DEO. 29, 1910.

- Paitented Feb.28,1911.

- UNITED STATES PATENT oEEIoE.

. WILLIAM MaK. BLACK, 0F WATERBURY, CONNECTICUT, ASSIGNOB. T0 S `VILL MANU- I FACTURING COMPANY, OF VVATERBURY, CONNECTICUT, A CORPORATION OF CDN- NECTICUT.

SOCKET-CAP.

Specification of Letters Patent.

Patented Feb. 28,1 911..

'o /llt whom it may concern:

lie it. knoivn that I, lfViLLtAa-l MCK. BLACK, a citizen of the United States, residing at Waterbury, i'n the county of New Haven and State ol' Connecticut, have invented a certain new and useful In'iproveinent in Boeket-Caps, of which the following is a full, elear. and exact. description.

As very commonly used, the rnetal eap of' elet-trie light shekels, is provided with an applied hub: internally serea'threaded to ad init of its heiney serewed on to the light tixture. This hub is usually cuty from Solid rod brass and n'iaehint-al to shape and has a flangeor other nieans ivhien is upset or headed up in ahole in the. rap. rThe eap is usually of sheet. brass and quite thin. binreY there is eonsiderable Strain put. upon the eap in applying` the hub to it', and in screwing the sot-liet to a fixture, it is obvious, that the uniting of a hub and eap of auch relatively diverse and unequal thickness and strength, presents practical difliculties of etnisiderable complexity. Various means have. been used to nieet these diflieulties.

The. present inventiol'i is desie'nel to enable, manufacturers to produce soeltets with a strain-resisting union of hub and eapin a simple and eeonoinieal manner.

rl`he invention consists of a eap having' a eontinuonsunbroken flange surrounding the huln. opening' and extendingl inwardly and surroninled and backed up by a washer laid in a recess, the hub having' a flange of about the saine depth as the said cap flange. and

thehnb 'l'lanee ca 'i tlanee and washer beine" a i l es rs united by nteans of staking' tools, eoni-prising a die, a punch holder eoiiperating with the die to hold the hub, eap and washer in position, and a punch in the holder so formed as'to upset thehub flange, eap tlange'antl Y'asher laterally in any desired 1nanner,'and therebyinterloek these three parts so 'intimately "und tir1nl \r as to resist the utmostI strains to which they are exposed in using,r the socket. Preferably this upsetting, socalled, etlected by the staking tools, imparts to the, eireular tlangesa polygonal etl'eet., so

v that the. strain is resisted byA axially` disposed angular joints which interpose a series of strain-resisting elements-'of' the full length or depth of the flanges.

Y Another advantage, of the "invention is that. the parts do not have, to be located vwith reference to some previously formed angular portions, as necessary where the cap flange, is inade polygonal.

[n the aceonipanying drawings, illustrat ing' the. invention, in the several figures of which like partel are similarly designated,

Figurel shows i n e1'oss-sectio1i,the three parts of the structure (.lt, ta ,hed,a1nl a plan-view ofthe washer. Fig. 2 is a perspective vieu' of the hub. Fig. 3 is an interior plan View of' the eap or shell. Fig. JL- is a longitudinal cross-section olf the assembled parts. Fig. 5 is an interior plan vienY o' the structure shoan in Fig. Fig. is a longitudinal section showing the staking tools as used. ltig. i' is a bottoni plan view of the Staking punch and its holder. respectively a side vienand a plan View of a nlotlilied forni of hub.

The eap or shell l may be vof any ap- 'proved inetal and configuration, and differs troni the ordinary eap in having the solid.` continuous or unbroken circular flange 2, extendinginto the interior of the cap and `surrmnnling the hub hole 3; and also in having the recess 4 encircling the flange Q. The eap flange and this recess are of sub stantiall)7 equal depth. The annular washer 5 is placed in the recess 4, and may be and pret`e1'abl \Y is of slightly less thieknessthan the depth of the recess and flange, so that the flange is baehed up by the 'asher lhe hab (t ma)Y be ot' usual construction, and it is provided with the flange 7 and .shoulder t. This hub flange is of substantially the saine depth as the `ap flange. 2, in order t )`,olit:1in the l, n'eatest possible interloeldng area; and in order to enhanceV its holding el'eet, the hub flange may be pes ripherallv hnurled or otherwise rougliened,

as indicated in Igs. 8 and Sl.

When the eap'lor shell, the washer and the hub are assembled, as shown in Fig. 6, any suitable staking tools may be used for elenehin; then; together b'v deforluingl or upsettiutbr the hub-flange, cap-flange and washer. as indicated at Sl in Figs. el and 5. I prefer to unite these parts rigidly and so as to prevent relative. turning thereof by lateral displacement of the nieta] in the line of the longitudinal axis of the socket or cap, t'or the reason that displacements so arranged present the most effective resistanee to such relative taining when exposed to the strains of applying the socketJ to a. fixture'. Furthermore, if such lateral displace# Figs. 8 and t) are Correction in Letters Patent No. 985,246.

hereby certified that in Letters Patent No. 985,246, granted February 28,

MCK. Black, of Waterbury, Connecticut, for

It is 1911, upon the application of William an improvement in Socket-Caps," :in error appears in the printed specification requiring correktion as follows: Page l` linx` 3;. ai: '0rd huh the comma should he strirkffn uut; nml that, tinl lwifi Letten4 lutent, should be read with this 'in to the record if the case in the Patent;

Signed and scaled this 21st day of Muri-h, A. D., 1911.

n. MOORE,

Commissioner of Patents.

[SEAL] 

